Synthesis of thiophenes from allenyl sulfones involving α,β-unsaturated sulfines as intermediates

Article abstract of DOI:10.1002/recl.19951140203

The synthesis of thiophenes starting from allenyl sulfones, via intermediate formation of α,β-unsaturated sulfines, is described.The allenyl sulfones were synthesized by a <2,3>-sigmatropic rearrangement of appropriately substituted prop-2-ynyl sulfinates